package com.hmdp.utils;

import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;
@Component
public class RedisIdWorker {
    private static final long BEGIN_TIMESTAMP = 1640995200L;
    private StringRedisTemplate stringRedisTemplate;
    public RedisIdWorker(StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate = stringRedisTemplate;
    }
    public long nextId(String keyPrefix) {
        LocalDateTime now=LocalDateTime.now();
        long nowSecond=now.toEpochSecond(ZoneOffset.UTC);
        // 获取当前时间戳
        long timestamp=nowSecond-BEGIN_TIMESTAMP;
        String date=now.format(DateTimeFormatter.ofPattern("yyyy:MM:dd"));
        long count = stringRedisTemplate.opsForValue().increment("icr:" + keyPrefix + ":" + date);
        return timestamp<<32 | count;
    }
}
